On 6 July 2015 at 04:08, Alexander Shishkin
wrote:
> A System Trace Module (STM) is a device exporting data in System Trace
> Protocol (STP) format as defined by MIPI STP standards. Examples of such
> devices are Intel Trace Hub and Coresight STM.
>
> This abstraction provides a unified interface
Chunyan Zhang writes:
> The code has already been submitted like I said in the earlier emails,
> you may refer [1].
>
> Thanks,
> Chunyan
>
> [1] https://lkml.org/lkml/2015/2/4/729
This code does the following (pasting from that patch):
in stm_probe():
drvdata = devm_kzalloc(dev, sizeof(*drvda
On Thu, Jul 30, 2015 at 2:59 PM, Chunyan Zhang wrote:
> On Thu, Jul 30, 2015 at 2:37 PM, Alexander Shishkin
> wrote:
>> Chunyan Zhang writes:
>>
>>> Sure, I mean, the root reason of this problem is here ( i.e.
>>> "stm_core_up" was zero then):
>>> if (!stm_core_up)
>>> return -EPRO
On Thu, Jul 30, 2015 at 2:37 PM, Alexander Shishkin
wrote:
> Chunyan Zhang writes:
>
>> Sure, I mean, the root reason of this problem is here ( i.e.
>> "stm_core_up" was zero then):
>> if (!stm_core_up)
>> return -EPROBE_DEFER;
>>
>> Why it was zero?
>> Because the function (i.e. st
Chunyan Zhang writes:
> Sure, I mean, the root reason of this problem is here ( i.e.
> "stm_core_up" was zero then):
> if (!stm_core_up)
> return -EPROBE_DEFER;
>
> Why it was zero?
> Because the function (i.e. stm_core_init() ) in which "stm_core_up"
> would be added one hasn't bee
On Thu, Jul 30, 2015 at 1:45 PM, Alexander Shishkin
wrote:
> Chunyan Zhang writes:
>
>> If let stm_probe() implement probe deferral, it has to have a global
>> variable for the later calling of "stm_register_device", because the
>
> No, it doesn't. Please read about probe deferral.
Could you ple
Chunyan Zhang writes:
> If let stm_probe() implement probe deferral, it has to have a global
> variable for the later calling of "stm_register_device", because the
No, it doesn't. Please read about probe deferral.
Regards,
--
Alex
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On Wed, Jul 29, 2015 at 9:46 PM, Alexander Shishkin
wrote:
> Mark Brown writes:
>
>> On Wed, Jul 29, 2015 at 04:25:10PM +0300, Alexander Shishkin wrote:
>>
>>> There has to be a way to defer stm_probe(), although a quick look at
>>> amba code suggests it's not implemented.
>>
>> What makes you sa
On Wed, Jul 29, 2015 at 9:25 PM, Alexander Shishkin
wrote:
> Chunyan Zhang writes:
>
>>> +/**
>>> + * stm_source_register_device() - register an stm_source device
>>> + * @parent:parent device
>>> + * @data: device description structure
>>> + *
>>> + * This will create a device of stm_so
Mark Brown writes:
> On Wed, Jul 29, 2015 at 04:25:10PM +0300, Alexander Shishkin wrote:
>
>> There has to be a way to defer stm_probe(), although a quick look at
>> amba code suggests it's not implemented.
>
> What makes you say this? Probe deferral is implemented in the driver
> core rather th
On Wed, Jul 29, 2015 at 04:25:10PM +0300, Alexander Shishkin wrote:
> There has to be a way to defer stm_probe(), although a quick look at
> amba code suggests it's not implemented.
What makes you say this? Probe deferral is implemented in the driver
core rather than individual buses, the buses
Chunyan Zhang writes:
>> +/**
>> + * stm_source_register_device() - register an stm_source device
>> + * @parent:parent device
>> + * @data: device description structure
>> + *
>> + * This will create a device of stm_source class that can write
>> + * data to an stm device once linked.
>
On Mon, Jul 6, 2015 at 6:08 PM, Alexander Shishkin
wrote:
> A System Trace Module (STM) is a device exporting data in System Trace
> Protocol (STP) format as defined by MIPI STP standards. Examples of such
> devices are Intel Trace Hub and Coresight STM.
>
> This abstraction provides a unified int
Chunyan Zhang writes:
>> +int __init stp_configfs_init(void)
>> +{
>> + int err;
>> +
>> + config_group_init(&stp_policy_subsys.su_group);
>> + mutex_init(&stp_policy_subsys.su_mutex);
>> + err = configfs_register_subsystem(&stp_policy_subsys);
>> +
>> + return err;
On Mon, Jul 6, 2015 at 6:08 PM, Alexander Shishkin
wrote:
> A System Trace Module (STM) is a device exporting data in System Trace
> Protocol (STP) format as defined by MIPI STP standards. Examples of such
> devices are Intel Trace Hub and Coresight STM.
>
> This abstraction provides a unified int
A System Trace Module (STM) is a device exporting data in System Trace
Protocol (STP) format as defined by MIPI STP standards. Examples of such
devices are Intel Trace Hub and Coresight STM.
This abstraction provides a unified interface for software trace sources
to send their data over an STM dev
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